 /*******************************************************************************
  * Copyright (c) 2004, 2006 IBM Corporation and others.
  * All rights reserved. This program and the accompanying materials
  * are made available under the terms of the Eclipse Public License v1.0
  * which accompanies this distribution, and is available at
  * http://www.eclipse.org/legal/epl-v10.html
  *
  * Contributors:
  * IBM Corporation - initial API and implementation
  *******************************************************************************/
 package org.eclipse.ui.internal.preferences;

 import java.util.HashSet ;
 import java.util.Set ;

 import org.eclipse.core.runtime.Preferences;

 /**
  * @since 3.1
  */
 public final class PreferencesAdapter extends PropertyMapAdapter {
     private Preferences store;
     
     private Preferences.IPropertyChangeListener listener = new Preferences.IPropertyChangeListener() {
         public void propertyChange(Preferences.PropertyChangeEvent event) {
             firePropertyChange(event.getProperty());
         }
     };
     
     public PreferencesAdapter(Preferences toConvert) {
         this.store = toConvert;
     }
     
     /* (non-Javadoc)
      * @see org.eclipse.ui.internal.preferences.PropertyMapAdapter#attachListener()
      */
     protected void attachListener() {
         store.addPropertyChangeListener(listener);
     }

     /* (non-Javadoc)
      * @see org.eclipse.ui.internal.preferences.PropertyMapAdapter#detachListener()
      */
     protected void detachListener() {
         store.removePropertyChangeListener(listener);
     }

     /* (non-Javadoc)
      * @see org.eclipse.ui.internal.preferences.IPropertyMap#keySet()
      */
     public Set keySet() {
         Set result = new HashSet ();
         
         String [] names = store.propertyNames();
         
         for (int i = 0; i < names.length; i++) {
             String string = names[i];
             
             result.add(string);
         }
         
         return result;
     }

     /* (non-Javadoc)
      * @see org.eclipse.ui.internal.preferences.IPropertyMap#getValue(java.lang.String, java.lang.Class)
      */
     public Object getValue(String propertyId, Class propertyType) {
         if (propertyType.isAssignableFrom(String .class)) {
             return store.getString(propertyId);
         }
         
         if (propertyType == Boolean .class) {
             return store.getBoolean(propertyId) ? Boolean.TRUE : Boolean.FALSE;
         }
         
         if (propertyType == Double .class) {
             return new Double (store.getDouble(propertyId));
         }
         
         if (propertyType == Float .class) {
             return new Float (store.getFloat(propertyId));
         }
         
         if (propertyType == Integer .class) {
             return new Integer (store.getInt(propertyId));
         }
         
         if (propertyType == Long .class) {
             return new Long (store.getLong(propertyId));
         }
         
         return null;
     }

     /* (non-Javadoc)
      * @see org.eclipse.ui.internal.preferences.IPropertyMap#propertyExists(java.lang.String)
      */
     public boolean propertyExists(String propertyId) {
         return store.contains(propertyId);
     }

     /* (non-Javadoc)
      * @see org.eclipse.ui.internal.preferences.IPropertyMap#setValue(java.lang.String, java.lang.Object)
      */
     public void setValue(String propertyId, Object newValue) {
         if (newValue instanceof String ) {
             store.setValue(propertyId, (String )newValue);
         } else if (newValue instanceof Integer ) {
             store.setValue(propertyId, ((Integer )newValue).intValue());
         } else if (newValue instanceof Boolean ) {
             store.setValue(propertyId, ((Boolean )newValue).booleanValue());
         } else if (newValue instanceof Double ) {
             store.setValue(propertyId, ((Double )newValue).doubleValue());
         } else if (newValue instanceof Float ) {
             store.setValue(propertyId, ((Float )newValue).floatValue());
         } else if (newValue instanceof Integer ) {
             store.setValue(propertyId, ((Integer )newValue).intValue());
         } else if (newValue instanceof Long ) {
             store.setValue(propertyId, ((Long )newValue).longValue());
         }
     }

 }

